Graphic user interface for a display screen



FIG. 1 is a front view of a graphical user interface for a display screen showing the new design; and,

FIG. 2 is a front view of a user interface for a display screen showing an alternative embodiment of the new design.

The broken line showings of the portion of the display screen are for environmental purposes and form no part of the claimed design. Unshown portions of the display screen form no part of the claimed design. 

The ornamental design for a graphical user interface for a display screen, as shown and described. 